main.go

// Functional Options Pattern
package main

import (
	"fmt"
)

func main() {
	ct := NewCompany(
		WitICO("11"),
		WithName("pepa"),
	)
	fmt.Println(ct)
}

type Company struct {
	ID   string
	Name string
	ICO  string
}

func NewCompany(opt ...Options) *Company {
	nc := &Company{}
	for _, o := range opt {
		o(nc)
	}
	return nc
}

type Options func(*Company)

func WithID(id string) Options {
	return func(c *Company) {
		c.ID = id
	}
}

func WithName(name string) Options {
	return func(c *Company) {
		c.Name = name
	}
}

func WitICO(ico string) Options {
	return func(c *Company) {
		c.ICO = ico
	}
}